Printing-plate holder.



No; 703,676. Patented luly I, |902. E. R. STORM.

PRINTING PLATE IIoLnI-n.

l (Application led Jan. 2, 1902.) (un Model.)

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UNITED STATES PATENT OFFICE.

EDWIN R. STORM, OF NEW YORK, N. Y.

PRINTING-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent N o. 703,676, dated July 1,1902.

Application filed January 2, 1902. Serial No. 88,126. (No model.)

To a/ZZ whom, it' r11/ty concern:

Be it known that I, EDWIN R. STORM, a citi- Zen of the United States,`residing at New York, in the county of` New York and State of New York,have invented a new and useful Printing-Plate Holder, of which thefollowing is a speciication.

My invention relates to improvements in holders for printing-plates inwhich plateclamps are used in conjunction with a grooved block; and theobjects of Vmy invention are," rst, to provide a plate-clamp that may beinserted at any point ofthe groove and be quickly and :reliably securedthereto; second, to provide a plate-clamp that will hold theprinting-plate to the grooved block when a sufticient number of theplate-clamps are secured in the grooves; third, to provide a plateclampthat may be quickly removed from the groove ywithout separating itscomponent parts. l attain these objects by means of the devicesillustrated in the accompanying drawings, in whichy Figure 1 is a viewof a portion of the grooved block with a printing-platel thereon,showing two ofthe plate-clamps secured -in'positiom Fig. 2 isa sectionalview ofA the block, showing the plate-'clamp secured within the grooveholding theprinting-plateto position, drawn to an enlarged scale. Fig. 3is a sectional view of the block and plate-'clarn'p,.sh`owing the methodof entering theplate-clamp in the groove, drawn to an enlarged scale.Fig. 4 is a sectional View of the block and groove, showing theplate-clamp partlyin the groove, drawn to an enlarged scale. Fig. 5 isan isometrical view of the face-piece of the plateclamp, drawn to anenlarged scale. Fig. 6 is an isometrical view of the nut of theplateclamp, drawn to an enlarged scale. Fig. 7 is an isometrical view ofa plate-clamp, drawn to an enlarged scale. Fig. S is an end view of amodified plate-clamp in which the sides 12'L 131 of the portion 6a are'not formed parallel and the nut is held by retaining-grooves Fig.

in sliding contact withthe portion 6". 9 is a side view of theplate-clamp shown in Fig. 8. Fig. 10 is a sectional View of theplateclamp shown in Fig. 8.

Similar numbers of reference indicate corresponding parts in the severalviews.

1 indicates the grooved block of my improved plate-holder, which blocklis of the same construction as now in common use,ot` any desiredsize,and consists of a block having grooves 2 of greater Widthy at the lower`Jthan Aat the upper part.

The printing -plate 3 is .secured to the grooved block 1 by meansof theplate-clamps 4. The plate-clamps 4 have'each a face-piece 5, providedwith a portion 6, a nut 7,"a screw 8, a countersunk hole 9, an edge 10,beveled to t against andholdthe edge of the printing-plate 3 when theplate-clamps 4 are secured in the grooves 2, and a shoulder 11. Theportion 6 has one face 12, adapted to fit against the inclined sidev2 ofthe groove 2, a face 13, adapted to work against the face 14 of the uut7, a face 15, formed to allow the nut 7 to approach the face 16 when thescrew 8 is heldin the nut, and a face 16, formed to assist in insertingtheV plateclamp in the groove and to remove the long sharp edge thatwould result in prolonging the faces 12 and 15. 'The portion 6` isrecessed at 17 to allow space for the screw 8 when the nut 7 is made toapproach the face 16.

The nut 7 is formed with a face 14, adapted to work against the face 13,a face 18, adapted to work against the inclined sides 22 of the groove2, two faces 19 and 20, formed parallel with each other and at" adistance apart slightly less than the top ot' the groove 2, so the nut 7may be easily inserted in the groove or withdrawn therefrom at anypoint, the thickness of the nut to be somewhat less than the depth ofthe groove. The nut 7 is provided with the threaded hole 2l.

The screw 8, fitted to andadapted to Work in the threaded hole 21, hasthe portion 22 of the head working in the countersunk hole 9 preferablyformed as a portion of the surface of a sphere, while the countersunkhole 9 is formed to fit and adapted to receive the spherically-formedportion 22 of the head of the screw 8. c

The shoulder 11 is formed. to tit inl the groove 2 when the plate-'clampis in position on' the block 1 and tends tokeep the clamp from turningwhen the screw 8 is turned.

The manner of using theplate-clamps is as follows: The tace-piece 5 andthe nut 7 havingV been connected by the screw 8 passing through thecountersunk hole 9 and working in the threaded hole 21, the screw S isturned until it is nearly withdrawn from the threaded hole 21. Thespherically-formed portion 22 of the head of the screw 8 is brought tobear against the surface of the counter-sunk hole 9, and the nut 7,sliding on the surface 15, is held with its face 14 as near as possibleto the face 1G of the portion (5. \Vit`n the several parts in thepositions indicated the nut 7 is inserted at any convenient point in thegroove 2, as indicated in Fig After the vnut passes into the groove itis forced to one side by the face 16 entering the groove and workingagainst one edge of it. Continuing the insertion, the nut 7 strikesagainst the bottom of the groove 2 and is moved by the face 15 farenough to one side to permit the portion 6 to enter the groove 2, withits face 12 working against the inclined side 2' of the groove and itsface 13 working against the face 14 of the nut 7. (See Fig. 4.) Pushingthe plate-clamp 4 to place, with the face-piece 5 bearing on the top ofthe block 1 and the beveled edge 10 against the beveled edge of theprinting-plate 3 and turning thc screw 8 so as to cause it pass furtherin the threaded hole 21, lifts the nut 7 from the bottom of the groove,causing the face 18 to bear against the inclined face 22 of the groove 2and the face 14 to bear against the face 13 of the portion 6. Thepressure against the face 13 is transmitted through the portion (5 tothe face l2, which bears against the inclined face 2 of the groove 2.The inclined faces 2 22 of the groove 2 being immovable stop the upwardmovement of the nut 7 and cause it upon the continued turning of thescrew to pull and hold the plate-clamp down to the face ot' the block 1,the portion 6 being forced to slide between the inclined side 2 of thegroove and the face 14 of the nut 7. Vhen lhe turning of the screw 8 hastaken up all sliding motion, it forces the nut 7 and the portion o intight frictional contact with the inclined sides 2' 22 of the groove 2,as shown in Fig. 2, thereby locking the plate-clamp immovably upon theblock. The beveled edge 10 being held in its desired position againstthe beveled edge of the printingplate at the moment of tightening thescrew bears against the beveled edge of the printing-plate when thescrew is tightened and tends to hold that portion of the printingplateto the block 1. Inserting a sulicient n umber ofthe plate-clamps withinthe grooves 2, causing them to hear against the beveled edges of theprinting-plate, and tightening their individual screws will hold theprinting-plate securely to the block 1.

lVhen it is desired to remove the plateclamp 4, the screw S is turneduntil it is nearly withdrawn from the threaded hole 21, the face-piece 5is lifted, when the portion 6 slides between the inclined side 2 of thegroove 2 and the face 14 of the nut 7. The nut 7 is forced by theinclined side 22 of the groove 2 to slide along the face 15, permittingthe face 1G to slide against the upper edge of the inclined side 2 andthe portion 6 to be wholly withdrawn from the groove, when the nut 7,attached by the screwS to the face-piece 5, is withdrawn from the groove2 by the screw 8.

Not wishing to be understood that the face 13 must be parallel to theface 12 I have shown in Fig. J a modified form of the plateclamp, inwhich the face 13u is inclined to the face 12 and the nut 7 is formedlonger than the portion 6 and is provided with the retaining-grooves 23,to which are itted the beveled ends 24 of the portion G. The beveledends 24, working within the retaininggrooves 23, hold the nut 7 and theportion G in sliding contact.

Fig. S is an end view ofthe modified plateclamp shown in Fig. 9, thescrew 8 being shown in dotted lines and given aconicalhead, as thespherically-formed head is not absolutely essential to the proper working of either form of plate-clamp.

Fig. 10 is a sectional viewof the plate-clamp shown in Fig. f), showingthe nut 7 moved to position requisite for entering the plateclamp in agroove. Because ofthe retaininggrooves 23 and the face 13 being inclinedto the face 12 the face 15 is omitted.

Having described my invention,I claim and desire to secure by LettersPatent- 1. In a holder for printing-plates the coinbination of a blockhaving grooves adapted to receive and hold one or more plate-clamps, andplate-clamps held in the grooves each of said clamps consisting ofaface-piece having a wedge-shaped portion adapted to enter and partlyfill the said groove, a nut adapted to be inserted at any point of thegroove and act in conjunction with the said portion in the groove tohold the face-piece to the block and a screw connecting said nut andface-piece.

2. In a holder for printing-plates the combination of a block havinggrooves adapted to receive and hold one or more plate-clamps andplate-clamps held in the grooves each of said clamps consisting of aface-piece having a portion adapted to enter and partly fill the groove,a face on the said portion adapted to lit against the side of thegroove, a nut adapted to be inserted at any point of the groove whileconnected to the face-piece and act in conjunction with the said portionin the groove to hold the face-piece to the block, and a screwconnecting said nut and face-piece.

3. In a holder for printing-plates the combination of a block havinggrooves adapted to receive and hold one or more plate-clamps, andplate-clamps heldin the grooves each of said clamps consisting of aface-piece having a portion adapted to enter and partly ill the groove,a nut narrower than the top of the said groove adapted to be inserted inthe groove and act in conjunction with the said portion in the groove tohold the face-piece to the block and a screw connecting said nut andface-piece.

4. In aholder for printing-plates the com- IIO bination of a blockhaving grooves adapted to receive and hold one or more plate-clamps, andplate-clamps held in the grooves, each of said clamps consisting of aface-piece having a portion adapted to enter and partly iill the groove,a nut of a width to permit it to beinserted at any point of the grooveand adapted to act in conjunction with the said portion in the groove tohold the face-piece to the block, and a screw having the bearing-surfaceof the head formed as a portion of the surface of a sphere, connectingsaid nut and face-piece.

-5. In a holder for printing-plates the combination of a block havinggrooves of greater width at the bottom than at the top and plateclampsadapted to beheld in the grooves, each of said clamps consisting of aface-piece having a portion adapted to enter and fit against one side ofthe groove, a nut adapted to bear against the other side of the grooveand the portion in the groove and act as a wedge in conjunction with thesaid portion to hold the face-piece to the block and a screw connectingsaid nut and face-piece.

G. In a holder for printing-plates the combination of a block havinggrooves of greater width at the bottom than at the top and plateclampsconsisting of 'a face-piece having a countersunk hole therein, a screwpassing through the countersunk hole in the facepiece and working in athreaded hole in a nut, and a nut adapted to pass into the groove at itsupper part Without'withdrawing the screw from the said threaded hole,and a projecting portion on the face-piece adapted to beinserted in thegroove vand prevent the withdrawal of the nut.

7. In a holder for printing-plates the combination of a block havinggrooves of greater width at the bottom than at the top and plateclampshaving a nut formed to partly iill the groove and adapted to pass intothe said groove at its upper part, a face-piece having a portion adaptedto enter the groove, force the nut to one side and act in conjunctionwith the nut to hold the face-piece to the block, and a screw connectingsaid nut and face-piece.

8. In a holder for printing-plates the combination of a block havinggrooves of greater width at the bottom than at the top and plateclampshaving a nut formed to'partlyll, and iit against one side of, the grooveand adapted to pass into the groove at its upper part,

an inclined plane forming one face of the said nut, a face-piece with aportion adaptedv the portion against one side of the groove and the nutagainst the other side of the groove.

9. In a holder for vprinting-plates the combination of a block havinggrooves of greatery width at the bottom than at the top and plateclampshaving a face-piece with a holding edge thereon, a portion extendingfrom the face-piece formed to enter and fit against one side of thegroove, a nut formed to pass into the groove at its upper part andpartly iill the said groove, a face on the said extended portion formedto force the nut to one side in entering the groove, a face on the saidnut formed to fit against and slide on the face formed on the saidextended portion and a screw connecting the nut and face piece adaptedto bring the nut in cooperation with the extended portion and hold theface-piece n to the block.

l0. In aholder for printing-plates the combination of a block havinggrooves adapted to receive and hold one or more plate-clamps, andplate-clamps held in the grooves, each of said clamps consisting of anut formed narrower than the top of the groove, a facepiece having aportion formed to enter the groove supplement the nut and prevent itswithdrawal from the groove and means, as a screw, adapted to Work in thenut to draw and hold the face-piece to the block.

1l. In a holder for printing-plates the combination of a block havinggrooves adapted to receive and hold one or more plate-clamps, and,plate-clamps held in the grooves each of said clamps consisting of a nutnarrower than the top of the said grooves andv adapted to be inserted atany point of the groove, a face-piece having a portion adapted to enterand hold the nut'within the groove, and a screw connecting the nut andface-piece.

EDWIN R. STORM.

Witnesses:

ALFRED W. STORM, HENRY PALMER.

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